英語四級單詞每天背 第0291期

fluctuation

英 [?fl?kt?u?e??n] 美 [?fl?kt?u?e??n]

n. 波動，起伏

例句：

The erratic fluctuation of market prices is in consequence of unstable economy.
經(jīng)濟(jì)波動致使市場物價忽起忽落。

Changes in climate before that period caused severe fluctuation in sea level, resulting in the extinction of the dinosaurs.
在此之前，氣候的變化導(dǎo)致了海平面的劇烈波動，恐龍因此滅絕。

Changes in climate before the Cretaceous period caused severe fluctuation in sea level, resulting in the extinction of the dinosaurs.
白堊紀(jì)以前的氣候變化導(dǎo)致了海平面的劇烈波動，引發(fā)了恐龍的滅絕。

patriotism

英 [?p?tri?t?z?m] 美 [?pe?tri?t?z?m]

n. 愛國主義，愛國精神

例句：

His friends have a newfound sense of patriotism.
他的朋友們有一種新萌生的愛國主義意識。

Patriotism is every politician's stock-in-trade.
愛國主義是每個政客的慣用伎倆。

He was a country boy who had joined the army out of a sense of patriotism and adventure.
他是個鄉(xiāng)下小伙子，出于愛國心和冒險(xiǎn)精神參了軍。

convict

英 [k?n?v?kt; ?k?nv?kt] 美 [k?n?v?kt; ?kɑnv?kt]

v. 定罪，宣判……有罪

n. 已決犯，服刑囚犯

例句：

Who said that all the men in the world should wear dull gray suits and convict haircuts?
誰說世界上所有的男人都應(yīng)該穿單調(diào)的灰色西裝，留著罪犯式的發(fā)型？

The escaped convict was seized outside the city.
逃犯在城外被抓獲。

The convict was pardoned after serving five years of his sentence.
罪犯服刑5年才獲赦免。

watertight

英 [?w??t?ta?t] 美 [?w??t?rta?t]

adj. （容器或房間）防漏水的，水密的；（理論、計(jì)劃或協(xié)議）嚴(yán)密的，無懈可擊的

例句：

The rules state that samples must be enclosed in two watertight containers.
條例規(guī)定樣品必須用兩個不漏水的容器封裝起來。

If she could just establish the time the picture had been taken, Mick would have a watertight alibi.
只要她能確定拍這張照片的時間，米克就可以有一個無懈可擊的不在現(xiàn)場的證據(jù)。

Only teak matches oak's expansion coefficient and stays watertight.
只有柚木才能達(dá)到橡木的膨脹系數(shù)，并保持水密性。

significance

英 [s?ɡ?n?f?k?ns] 美 [s?ɡ?n?f?k?ns]

n. 重要性，意義；意思，含義

例句：

They discussed the statistical significance of the results.
他們討論了這些結(jié)果在統(tǒng)計(jì)學(xué)上的意義。

The president's visit is loaded with symbolic significance.
總統(tǒng)的訪問富有象征意義。

Western diplomats have played down the significance of the reports.
西方的外交官們已貶低了這些報(bào)告的重要性。

回顧

1. fluctuation
2. patriotism
3. convict
4. watertight
5. significance